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1.前言串馈脉宽调制式调幅发射机(以下简称“串馈PDM机”)的调制级有许多问题需要研究。本文仅就(1)调制级电压电流等基本关系和效率;(2)占空因数k;(3)包络波形的“平谷”;(4)包络波形的“冒尖”等几个问题,
1. INTRODUCTION There are many problems that need to be studied in the modulation level of a series-fed pulse width modulation (AM) transmitter (hereinafter referred to as “serial-fed PDM”). This article only on (1) modulation level voltage and current and other basic relations and efficiency; (2) duty cycle k; (3) Envelope waveform “Pinggu”; (4) Envelope waveform "